1 package internal
2
3 import (
4 "context"
5 "fmt"
6 "io"
7 "net/http"
8 "time"
9
10 "github.com/go-acme/lego/v4/log"
11 "github.com/go-acme/lego/v4/providers/dns/internal/errutils"
12 )
13
14 const getIPURL = "https://dynamicdns.park-your-domain.com/getip"
15
16 // GetClientIP returns the client's public IP address.
17 // It uses namecheap's IP discovery service to perform the lookup.
18 func GetClientIP(ctx context.Context, client *http.Client, debug bool) (addr string, err error) {
19 if client == nil {
20 client = &http.Client{Timeout: 5 * time.Second}
21 }
22
23 req, err := http.NewRequestWithContext(ctx, http.MethodGet, getIPURL, http.NoBody)
24 if err != nil {
25 return "", fmt.Errorf("unable to create request: %w", err)
26 }
27
28 resp, err := client.Do(req)
29 if err != nil {
30 return "", err
31 }
32
33 defer func() { _ = resp.Body.Close() }()
34
35 clientIP, err := io.ReadAll(resp.Body)
36 if err != nil {
37 return "", errutils.NewReadResponseError(req, resp.StatusCode, err)
38 }
39
40 if debug {
41 log.Println("Client IP:", string(clientIP))
42 }
43
44 return string(clientIP), nil
45 }
46